US2961020A

US2961020A - Edge-gluer

Info

Publication number: US2961020A
Application number: US690325A
Authority: US
Inventors: Minami Masatsugu
Original assignee: Individual
Current assignee: Individual
Priority date: 1957-10-15
Filing date: 1957-10-15
Publication date: 1960-11-22
Anticipated expiration: 1977-11-22
Also published as: DE1147376B

Description

Nov. 22, 1960 MAsATsUGU MlNAMl 2,961,020

EDGE-GLUER 2 Sheets-Sheet 1 Filed Oct. 15, 1957 a# M ATTORNEYS Nov. 22, 1960 MAsATsuGU MINAMI 2,961,020

EDGE-GLUER Filed Oct. 15. 1957 2 Sheets-Sheet 2 f. l l n.

INVENTOR.

W M M M U R Gavw U T Qu A IY m3. A M

`United States Patent O 2,961,020 EDGE-GLUER Masatsugu Minarni, 1,527 Takagicho, Meguro-ku, Tokyo, Japan Filed Oct. 15, 1957, Ser. No. 690,325

3 Claims. (Cl. 144-279) The present invention relates to machines for preparing wide wood plates by gluing narrow wood sheets at their edges. More particularly, this invention is concerned with a sheet edge-gluing mechanism having two sets of endless chain arranged vertically one above the other and in contact with each other along a level surface and being arranged in such manner as to reduce the intervals between the chain plates with the advancement of the chain, thus producing a lateral pressure on the wood sheets inserted and conveyed horizontally between the upper and lower chain in order to carry out a perfect edge-gluing of said wood sheets.

The object of the present invention is to provide wood plates by gluing edges of ordinary long-slender thin wood sheets, to be used for manufacturing plywood panels.

Other obje-cts, features and advantages will be apparent from the following detailed description taken in combination with the accompanying drawings, in which:

Fig. 1 is a longitudinal cross-sectional view of the present invention,

Fig. 2 is an enlarged partial plan view taken along the line 2-2 of Fig. l in the direction of the arrows showing the gluing of side edges of thin wood plates.

Fig. 3 is a transverse section taken along the line 3 3 of Fig. l in ythe direction of the arrows.

Fig. 4 is a transverse section taken along the line 4 4 of Fig. l in the direction of the arrows.

Fig. 5 is an enlarged detail perspective view of a plate and its connecting links forming part of the present device.

The figures show only one example embodying the present invention. In Fig. l, the frame 1 contains a pair of endless chains 1a and 1b which are arranged one above the other. That is to say, the upper endless chain 1a meshes with the driving ychain wheel 2 and the follower chain wheel 3, while the lower endless chain 1b meshes with the driving chain wheel 4 and the follower chain wheel 5. Both of said endless chains are in contact with each other at their adjacent medial portions between said driving `Wheels and said follower chain wheels. Both upper and lower chains are constructed i-n the same way.

Each chain plate 6 is narrow in width in comparison with its length and are of a tongue and groove formation at their side edges. Also, the chain plates are constructed in such a way that, when the interval between adjacent plates is diminished, their side edges are brought into contact with each other (as shown in Fig. 2) forming a continuous plane.

As shown in Fig. 5, at `both ends of the back face of the chain plate 6 there extend

bosses

7 and 8 each bearing the shaft 9 which pivotally supports two connecting

links

9a and 9b of equal length, at one end. Said connecting

links

9a and 9b are thereby hinged to each chain plate 6 and the connecting

links

9a and 9b hinged to adjacent chain plates are connected to each other by a shaft 10 at their lower end (see Figs. l and 5).

At each outer end of said

shafts

9 and 10, i.e. at

"ice

each en d adjacent the inner face of frame 1 there are attached the

rollers

11 and 12 respectively.

Both upper and lower chains thus constructed areV guided by grooves provided in the frame in which they travel. That is to say, the contact surface between both chains (see Fig. 1) and each two rows of the guiding grooves 13 and 13' of the roller 11 and the

guiding grooves

14 and 14 of the roller 12 are arranged in symmetry each on an upper and lower side of the contact surface of said chains. The beginning and end portions of guiding grooves 13 and 13' are parallel to said horizontal contact surface of said chains, but the middle part of the

guiding grooves

14 and 14 between the portion yof the chains corresponding to the part between lines C and D, shown in Fig. 1, is inclined in the advancing direction of the chain in such a way that said part is gradually extended away from the horizontal plane.

The beginning portion and end portion of the guiding

grooves

14 and 14 are constructed parallel to a horizontal plane in `order to feed the chain by the chain wheel as smoothly as possible by making the spacing of the recesses on the peripheral surface of each chain wheel equal to the spacing of shafts 10 of the connecting

links

9a and 9b when riding in the beginning and end guiding groove portions.

The outermost run of upper chain 1a rides in

grooves

15 and 16 and the outermost run of lower chain 1b rides in

grooves

15 and 16. Grooves 16 and 16' are inclined outwardly in the advancing directions of their respective outermost runs. Thus it is seen that the grooves are symmetrical about the horizontal contact surface.

The track containing guiding

grooves

13 and 14 of the upper chain 1a is arranged for up and down movement on said frame. The track is hung by the bolts 18 from the transverse beams 17, which are fixed on both side walls of the frame, the track being pressed downwardly by the springs 19 wound around said bolts. Thus, the upper chain may move in accordance with the thickness of the thin plates to be glued when the latter are interposed between the upper and lower chains. Driving gear wheel 20 is Xed on the shaft of the driving chain wheel 4 of the lower chain and driving chain wheel 21 is similarly associated with the upper chain and

gear train

22, 23 and 24 is arranged between the driving chain wheels 2 and 4.

Gear train 22, 23 and 24 drives chain wheel 2 at the same angular velocity as chain wheel 4. Chain wheels 2 and 4 rotate in the directions indicated by arrows in Figure 1.

The heating apparatuses 25 and 25', which are supported by the transverse beam 17, heat the upper and lower face of the chain and promote the drying of the binding agent at the edges to be glued and hasten the gluing action.

When the upper and lower chain are moved by the driving wheels 2 and 4 in the direction shown by the arrow at the same peripheral speed, on the horizontal plane on which the upper and lower chain plates move in contact with each other, the rollers 11 mounted on the shafts 9 at the back faces of the chain plates 6 of the upper and lower chains move in the

guiding grooves

13 and 13 parallel to the horizontal plane of contact of said chains, while the rollers 12 on the shafts 10 connecting the

links

9a and 9b move in said inclined grooves 14 and 14', so that the vertical distance between the rollers 12 and the rollers 11 is increased gradually. Accordingly the interval between the adjacent chain plates 6 is decreased. Thus the horizontal gap X (Figure 2) between each adjacent chain plate at the beginning is gradually diminished, and is brought to zero in accordance with the movement of the chain, and then the edges are brought in Y 3 V contact with each other, thus forming a wide plate (see Fig. 2).

Now, theupper and lower chains are driven by the driving chain wheels 2 and 4 and the thin wood plates W, on the edge surfaces of which a binding agenthas been previously. coated, are inserted between the follower" chain wheels 3 and 5 one by one in series in such` a way that the plates are placed perpendicular to the advancing direction of the chain. The gap X between thel thin plates is previously determined so as to be a little less than the amount of the decrease of the distance between the chain plates to be producedby the inclined guiding grooves. Then, at the time when the thin wood plates interposed between the upper and lower chain platesk pass toward the point C (see Fig. 1) during their travel, the gap between each adjacent thin plate begins to decrease, and, at last, the edges comeiu contact with each other, giving the edge to be glued a lateral pressure.

Moreover, as both upper and lower chain plates come in contact with their adjacent plates and their facing tongue and groove edges are engaged with each other forming a single plate, there occurs total contact at the contacting surfaces of the interposed wood plates without any bending in said plates by heating. Thus even narrow and very thin plates W can be glued at their side edges very rmly. With regards to the form of the chain plate 6, in Fig. 2, only one example is shown, but the edges may be formed with any zigzaz configuration so as to mesh with each other, and evenv in case these meshing parts do not completely contact, the narrow plate would still be pressed between upper and lower chain plates, since their initial interval X is substantially less than the initial interval X between chain plates 6.

0f course it should be understood that there may be various dilerent embodiments of the device without departing from the scope of the present invention.

Having now particularly described the nature of my invention, I claim:

1. A machine for producing wide wood sheets from a series of relatively narrow wood plates comprising a supporting fframe, two pairs of driven cog wheels rotatably supported with one pair above the other across` said frame, two series of pivotally connected links each providing an endless chain extending around one of said pair of cog wheels for being driven thereby, a plurality of plates each pivotally connected to a connected pair of said links, and means for guiding each of said link chains for moving opposing plates of said link chains toward one another along a horizontal plane and for spacing adjacent plates of each link chain horizontally apart at one end of said frame while progressively moving said adjacent plates in a longitudinal direction of said chains to edge-edge contact at the other end of said frame whereby narrow wood plates having glue on the edges thereof can be placed on said plates at said one end of said frame, held in said horizontal plane by said opposing plates and progressively moved into edge-edge contact in a horizontal direction by said plates, forming a wide wood sheet thereof.

2. A machine for producing wide wood sheets from a series of relatively narrow wood plates as claimed in claim l, whereinV said guiding means consists of a pair of grooved tracks supported by said frame for each of said link chains with one groove extending horizontally and the other groove extending on an angle thereto, a plurality of rollers each carried by one of said plates and moving in said horizontal track and a plurality of rollers carried by `said links and moving Vin said angularly extending track.

3. A machine yfor producing wide wood sheets from a series of relatively narrow wood plates as claimed in claim 1, wherein said plates havev irregular adjacent edges capable of mating when said plates are. brought into contact forming a contiguous. surface supporting said wideV wood sheet.

References Cited in me le of this patent UNITED STATES PATENTS 2,071,999 Dike Feb. 23, 1937 2,504,673 Fischer-Schmutz Apr. 18, 195() 2,631,622 Bergvall etal Mar. 17, 1953 2,657,160 Croston Oct. 27, 1953